DE3921714A1 - PROCESS FOR THE SELECTIVE ABSORPTION OF CHLORINE FROM CO (ARROW DOWN) 2 (ARROW ABLE) CONTAINING EXHAUST GASES - Google Patents

PROCESS FOR THE SELECTIVE ABSORPTION OF CHLORINE FROM CO (ARROW DOWN) 2 (ARROW ABLE) CONTAINING EXHAUST GASES

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Publication number
DE3921714A1
DE3921714A1 DE3921714A DE3921714A DE3921714A1 DE 3921714 A1 DE3921714 A1 DE 3921714A1 DE 3921714 A DE3921714 A DE 3921714A DE 3921714 A DE3921714 A DE 3921714A DE 3921714 A1 DE3921714 A1 DE 3921714A1
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Germany
Prior art keywords
chlorine
arrow
nahco3
nahso3
solution
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DE3921714A
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German (de)
Inventor
Ulrich Dr Girrbach
Edgar Dr Haertl
Richard Dr Grimm
Egon Malow
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Hoechst AG
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Hoechst AG
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6384125&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3921714(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Hoechst AG filed Critical Hoechst AG
Priority to DE3921714A priority Critical patent/DE3921714A1/en
Priority to DE59005324T priority patent/DE59005324D1/en
Priority to EP90112184A priority patent/EP0406675B1/en
Priority to BR909003060A priority patent/BR9003060A/en
Priority to US07/546,244 priority patent/US5102638A/en
Priority to JP2170344A priority patent/JPH03131319A/en
Publication of DE3921714A1 publication Critical patent/DE3921714A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/68—Halogens or halogen compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Treating Waste Gases (AREA)
  • Gas Separation By Absorption (AREA)

Description

Bei der Verbrennung nach dem DEACON-Gleichgewicht chlorierter Kohlenwasserstoffe entsteht neben Chlorwasserstoff und CO₂ auch elementares Chlor. Dieses Chlor darf nicht an die Umgebung abgegeben werden und muß daher weitestgehend aus dem Abgas entfernt werden. In der Bundesrepublik Deutschland muß die Chlorkonzentration unterhalb 5 mg/m³ liegen.Chlorinated after combustion at the DEACON equilibrium Hydrocarbons formed in addition to hydrogen chloride and CO₂ also elemental chlorine. This chlorine is not allowed on the Environment must be submitted and therefore must as far as possible be removed from the exhaust. In the Federal Republic Germany must have the chlorine concentration below 5 mg / m³ lie.

Die Absorption von Chlor aus Gasströmen erfolgt bisher im allgemeinen mit Natronlauge unter Bildung von Natriumhypochlorit:The absorption of chlorine from gas flows is done so far in general with caustic soda to form sodium hypochlorite:

Cl₂ + 2 NaOH → NaCl + NaOCl + H₂OCl₂ + 2 NaOH → NaCl + NaOCl + H₂O

Bei Gasströmen, die neben Chlor nur Inertgase enthalten, entsteht aus dem Absorptionsmittel ein technisch verwertbares Produkt (NaOCl-Lösung). Enthält das zu absorbierende Abgas jedoch neben Cl₂ noch andere alkalilösliche Gase, so fällt bei gleicher Vorgehensweise eine Lösung aus mehreren Salzen an, die weitgehend unverwertbar ist. Beispielsweise wird auch CO₂ unter Bildung von NaHCO₃ von Natronlauge absorbiert:For gas streams containing only inert gases in addition to chlorine, arises from the absorbent a technical usable product (NaOCl solution). Include that too absorbing exhaust gas, however, in addition to Cl₂ others alkali-soluble gases, so falls with the same procedure a solution of several salts, largely is unusable. For example, CO₂ is under Formation of NaHCO₃ absorbed by sodium hydroxide solution:

NaOH + CO₂ → NaHCO₃NaOH + CO₂ → NaHCO₃

Die Beseitigung von NaOCl in solchen Salzgemischen erfolgt nach dem Stand der Technik durch Zugabe von Na₂SO₃.The removal of NaOCl in such salt mixtures takes place according to the prior art by adding Na₂SO₃.

Zur Minimierung der unerwünschten gleichzeitigen Absorption von CO₂ wurden bereits viele Anstrengungen unternommen, so daß für spezielle Anwendungen bereits Techniken bekannt sind. To minimize unwanted simultaneous absorption Many efforts have already been made of CO₂, so that techniques are already known for specific applications.  

Ein in der DE-OS 28 49 498 beschriebenes Verfahren nutzt zwei mit NaOH betriebene Absorptionskreisläufe zur Absorption von Cl₂ zu NaCl und NaOCl. Ein Teil des entstandenen NaOCl wird dauernd ausgeschleust und mit NaHSO₃ zersetzt. Das nach diesem Verfahren gereinigte Abgas enthält jedoch noch ca. 10 ppm, d. h. etwa 30 mg/m³ Chlor.A method described in DE-OS 28 49 498 uses two NaOH operated absorption cycles for Absorption of Cl₂ to NaCl and NaOCl. Part of the resulting NaOCl is constantly discharged and with NaHSO₃ decomposes. The purified by this process exhaust still contains about 10 ppm, d. H. about 30 mg / m³ chlorine.

Die in der US-PS 39 84 523 beschriebene mehrstufige Gegenstromabsorption von Chlor mit Natronlauge eignet sich nur für Gasströme, die erstens hoch mit Chlor beladen sind und zweitens CO₂ in einer ähnlichen Konzentration wie Cl₂ enthalten. Für 100-1000fachen Überschuß an CO₂ gegenüber Cl₂ im Abgas ist dieses Verfahren wegen der starken Absorption von CO₂ in Alkali jedoch nicht geeignet. Bei hohen Chlorbeladungen im Abgas wird das in der letzten Stufe absorbierte CO₂ in der ersten Stufe vom Chlor wieder ausgetrieben, was bei niedrigen Chlorbeladungen nicht möglich ist. Die US-PS 39 84 523 lehrt weiterhin, daß es nicht möglich sei, durch Waschen mit NaHCO₃-Lösung einen niedrigeren Chlorgehalt als 5 mg/m³ Cl₂ im Abgas einzustellen.The multistage described in US-PS 39 84 523 Countercurrent absorption of chlorine with caustic soda solution is suitable only for gas flows that are firstly heavily loaded with chlorine and second, CO₂ in a concentration similar to Cl₂ contain. For 100-1000 times the excess of CO₂ compared Cl₂ in the exhaust gas is this process because of the strong However, absorption of CO₂ in alkali is not suitable. at high chlorine loadings in the exhaust gas will be in the last Stage absorbed CO₂ in the first stage of chlorine again expelled, which is not at low chlorine loads is possible. The US-PS 39 84 523 further teaches that it is not possible by washing with NaHCO₃ solution a lower chlorine content than 5 mg / m³ Cl₂ in the exhaust gas adjust.

Überraschenderweise wurde nun gefunden, daß mit einer NaHCO₃-Lösung, der geringe Mengen an NaHSO₃ zugesetzt werden, eine weitestgehende Cl₂-Entfernung auch bei vielfacher Wiederverwendung der gebrauchten Waschlösung möglich ist, ohne daß CO₂ absorbiert wird. Die erreichten Werte an Cl₂ im gereinigten Gas lagen unterhalb der analytischen Nachweisgrenze.Surprisingly, it has now been found that with a NaHCO₃ solution containing small amounts of NaHSO₃ added be, a far-reaching Cl₂ removal also at multiple reuse of used washing solution is possible without CO₂ is absorbed. The reached Values of Cl₂ in the purified gas were below the analytical detection limit.

Gegenstand der Erfindung ist ein Verfahren zur selektiven Absorption von Chlor aus CO₂-haltigem Abgas, dadurch gekennzeichnet, daß man das Abgas mit einer wäßrigen Lösung wäscht, die 0,1-10 Gew.-% NaHCO₃ und 0,01-5 Gew.-% NaHSO₃ enthält. Vorzugsweise enthält die wäßrige Lösung, mit der das Abgas gewaschen wird, 0,5-7 Gew.-% NaHCO₃ und 0,05-1 Gew.-% NaHSO₃, insbesondere 1-5 Gew.-% NaHCO₃ und 0,1-0,5 Gew.-% NaHSO₃. The invention relates to a method for selective Absorption of chlorine from CO₂-containing exhaust gas, thereby characterized in that the exhaust gas with an aqueous solution washes, the 0.1-10 wt .-% NaHCO₃ and 0.01-5 wt .-% NaHSO₃ contains. Preferably, the aqueous solution containing, with the exhaust gas is washed, 0.5-7 wt .-% NaHCO₃ and 0.05-1 wt .-% NaHSO₃, in particular 1-5 wt .-% NaHCO₃ and 0.1-0.5 wt .-% NaHSO₃.  

Statt NaHCO₃ kann man der Waschlösung auch NaOH zugeben, da dieses sofort mit dem CO₂ des Abgases zu NaHCO₃ reagiert. Falls das Abgas SO₂ enthält, kann man analog anstelle von NaHSO₃ der Waschlösung NaOH zugeben, da dieses mit dem SO₂ zu NaHSO₃ reagiert.Instead of NaHCO₃ can be added to the wash solution and NaOH, since this reacts immediately with the CO₂ of the exhaust gas to NaHCO₃. If the exhaust gas contains SO₂, you can analog instead of NaHSO₃ the wash solution add NaOH, since this with the SO₂ reacted to NaHSO₃.

Das erfindungsgemäße Verfahren erlaubt es, hohe Salzkonzentrationen in der umgepumpten Waschlösung zu halten. Dadurch muß nur sehr wenig verbrauchte Waschlösung durch neue Waschlösung ersetzt werden.The process according to the invention allows high salt concentrations to keep in the pumped wash solution. As a result, only very little used washing solution through new washing solution to be replaced.

Die Absorption von Chlor aus CO₂-haltigen Abgasen (Rauchgasen) erfolgt kontinuierlich in einer ein- oder mehrstufigen Absorptionsanlage (Kolonne, Strahlwäscher etc.).The absorption of chlorine from CO₂-containing exhaust gases (Flue gases) takes place continuously in a on or multi-stage absorption system (column, jet scrubber etc.).

Das erfindungsgemäße Verfahren kann so betrieben werden, daß dauernd soviel frische Absorptionslösung zugegeben wird, daß der pH-Wert ungefähr konstant bleibt.The method according to the invention can be operated in this way that constantly added so much fresh absorption solution it will be that the pH remains approximately constant.

Das erfindungsgemäße Verfahren eignet sich insbesondere für CO₂-reiche Gase, sogar für solche, deren CO₂-Gehalt 10⁴- bis 10⁶mal so hoch ist wie der Cl₂-Gehalt.The inventive method is particularly suitable for CO₂-rich gases, even those whose CO₂ content 10⁴- to 10⁶ times as high as the Cl₂ content.

Die folgenden Beispiele sollen die Erfindung erläutern.The following examples are intended to illustrate the invention.

Beispiel 1Example 1

In einem Strahlwäscher wurden 1,8 m³/h eines Abgases gereinigt, welches 70 mg/m³ Cl₂, 20 Vol.-% CO₂ und 4% O₂ enthielt, der Rest war N₂.In a jet scrubber 1.8 m³ / h of an exhaust gas purified, which 70 mg / m³ Cl₂, 20 vol .-% CO₂ and 4% O₂ contained, the rest was N₂.

Die Waschlösung enthielt im stationären Zustand neben Wasser:The washing solution contained in the stationary state next to water:

1. NaHCO₃1. NaHCO₃ 4 Gew.-%4% by weight 2. NaHSO₃2. NaHSO₃ 0,4 Gew.-%0.4% by weight 3. Na₂SO₄3. Na₂SO₄ 0,3 Gew.-%0.3% by weight 4. NaCl4. NaCl 0,2 Gew.-%0.2% by weight

Pro Stunde wurden 100 ml Waschlösung abgezogen und durch frische Waschlösung ersetzt. Die frische Waschlösung enthielt neben Wasser:100 ml of washing solution were withdrawn per hour and passed through fresh wash solution replaced. The fresh wash solution contained next to water:

1. NaHCO₃1. NaHCO₃ 4,3 Gew.-%4.3% by weight 2. NaHSO₃2. NaHSO₃ 0,6 Gew.-%0.6% by weight

Der Hold up des Strahlwäschers war 8 l, die umgepumpte Menge an Waschlösung betrug ca. 35 l/h. Dies entspricht einem Verhältnis Gas : Flüssigkeit von ca. 50 : 1. Die Konzentration an Chlor im gereinigten Abgas am Ausgang des Wäschers lag bei weniger als 0,1 mg Cl₂/m³ Gas. Die Bestimmung der Chlorkonzentration erfolgte nach dem Methylorange-Verfahren (VDI-Handbuch "Reinhaltung der Luft", Band 5, Register 9, Richtlinie VDI 3488, Blatt 1).The hold up of the jet scrubber was 8 l, the pumped over Amount of washing solution was about 35 l / h. This matches with a ratio of gas: liquid of about 50: 1. The Concentration of chlorine in the purified waste gas at the outlet of the Waser was less than 0.1 mg Cl₂ / m³ gas. The Determination of the chlorine concentration was carried out after the Methyl orange process (VDI manual "keeping the air clean", Volume 5, register 9, guideline VDI 3488, sheet 1).

Beispiel 2example 2

In einem Strahlwäscher wurden 1,8 m³/h eines Abgases gereinigt, welches außer N₂ noch 130 mg/m³ an Chlor, 20 Vol.-% CO₂ und 4% O₂ enthielt. Die Waschlösung enthielt im stationären Zustand neben Wasser:In a jet scrubber 1.8 m³ / h of an exhaust gas purified, which except N₂ still 130 mg / m³ of chlorine, Contained 20 vol .-% CO₂ and 4% O₂. The washing solution contained in stationary condition next to water:

1. NaHCO₃1. NaHCO₃ 4 Gew.-%4% by weight 2. NaHSO₃2. NaHSO₃ 0,4 Gew.-%0.4% by weight 3. Na₂SO₄3. Na₂SO₄ 0,5 Gew.-%0.5% by weight 4. NaCl4. NaCl 0,4 Gew.-%0.4% by weight

Pro Stunde wurden 100 ml Waschlösung abgezogen und durch frische Waschlösung ersetzt. Die frische Waschlösung enthielt neben Wasser:100 ml of washing solution were withdrawn per hour and passed through fresh wash solution replaced. The fresh wash solution contained next to water:

1. NaHCO₃1. NaHCO₃ 5 Gew.-%5% by weight 2. NaHSO₃2. NaHSO₃ 0,8 Gew.-%0.8% by weight

Ansonsten wurde wie in Beispiel 1 gearbeitet.Otherwise, the procedure was as in Example 1.

Die Konzentration an Chlor im gereinigten Abgas am Ausgang des Wäschers lag bei weniger als 0,1 mg Cl₂/m³ Gas.The concentration of chlorine in the purified waste gas at the outlet the scrubber was less than 0.1 mg Cl₂ / m³ gas.

Claims (3)

1. Verfahren zur selektiven Absorption von Chlor aus CO₂-haltigem Abgas, dadurch gekennzeichnet, daß man das Abgas mit einer wäßrigen Lösung wäscht, die 0,1-10 Gew.-% NaHCO₃ und 0,01-5 Gew.-% NaHSO₃ enthält.1. A process for the selective absorption of chlorine from CO₂-containing exhaust gas, characterized in that the waste gas is washed with an aqueous solution containing 0.1-10 wt .-% NaHCO₃ and 0.01-5 wt .-% NaHSO₃ , 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man das Abgas mit einer wäßrigen Lösung wäscht, die 0,5-7 Gew.-% NaHCO₃ und 0,05-1 Gew.-% NaHSO₃ enthält.2. The method according to claim 1, characterized in that the waste gas is washed with an aqueous solution which 0.5-7 wt .-% NaHCO₃ and 0.05-1 wt .-% NaHSO₃ contains. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man das Abgas mit einer wäßrigen Lösung wäscht, die 1-5 Gew.-% NaHCO₃ und 0,1-0,5 Gew.-% NaHSO₃ enthält.3. The method according to claim 1, characterized in that the waste gas is washed with an aqueous solution which Contains 1-5 wt .-% NaHCO₃ and 0.1-0.5 wt .-% NaHSO₃.
DE3921714A 1989-07-01 1989-07-01 PROCESS FOR THE SELECTIVE ABSORPTION OF CHLORINE FROM CO (ARROW DOWN) 2 (ARROW ABLE) CONTAINING EXHAUST GASES Withdrawn DE3921714A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE3921714A DE3921714A1 (en) 1989-07-01 1989-07-01 PROCESS FOR THE SELECTIVE ABSORPTION OF CHLORINE FROM CO (ARROW DOWN) 2 (ARROW ABLE) CONTAINING EXHAUST GASES
DE59005324T DE59005324D1 (en) 1989-07-01 1990-06-27 Process for the selective absorption of chlorine from CO2-containing exhaust gases.
EP90112184A EP0406675B1 (en) 1989-07-01 1990-06-27 Process for selective absorption of chlorine from waste gases containing CO2
BR909003060A BR9003060A (en) 1989-07-01 1990-06-29 PROCESS FOR SELECTIVE CHLORINE ABSORPTION FROM RESIDUAL GAS CONTAINING CO2
US07/546,244 US5102638A (en) 1989-07-01 1990-06-29 Process for the selective absorption of chlorine from CO2 -containing off-gases
JP2170344A JPH03131319A (en) 1989-07-01 1990-06-29 Method of absorbing chlorine selectively from carbon dioxide containing waste gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3921714A DE3921714A1 (en) 1989-07-01 1989-07-01 PROCESS FOR THE SELECTIVE ABSORPTION OF CHLORINE FROM CO (ARROW DOWN) 2 (ARROW ABLE) CONTAINING EXHAUST GASES

Publications (1)

Publication Number Publication Date
DE3921714A1 true DE3921714A1 (en) 1991-01-10

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ID=6384125

Family Applications (2)

Application Number Title Priority Date Filing Date
DE3921714A Withdrawn DE3921714A1 (en) 1989-07-01 1989-07-01 PROCESS FOR THE SELECTIVE ABSORPTION OF CHLORINE FROM CO (ARROW DOWN) 2 (ARROW ABLE) CONTAINING EXHAUST GASES
DE59005324T Expired - Fee Related DE59005324D1 (en) 1989-07-01 1990-06-27 Process for the selective absorption of chlorine from CO2-containing exhaust gases.

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE59005324T Expired - Fee Related DE59005324D1 (en) 1989-07-01 1990-06-27 Process for the selective absorption of chlorine from CO2-containing exhaust gases.

Country Status (5)

Country Link
US (1) US5102638A (en)
EP (1) EP0406675B1 (en)
JP (1) JPH03131319A (en)
BR (1) BR9003060A (en)
DE (2) DE3921714A1 (en)

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US5254323A (en) * 1988-02-16 1993-10-19 Mitsui Toatsu Chemicals, Incorporated Industrial process for the separation and recovery of chlorine
USH1417H (en) * 1993-01-27 1995-02-07 The Dow Chemical Company Process for removing halogen gases from a gas stream containing carbon dioxide
DE19536976A1 (en) * 1995-10-04 1997-04-10 Basf Ag Process for the selective separation and recovery of chlorine from gas mixtures
JPH11216334A (en) * 1998-01-29 1999-08-10 Naoetsu Electronics Co Ltd Method for treatment of chlorine gas
IT1318320B1 (en) 2000-02-18 2003-08-25 Tesi Ambiente S R L PROCEDURE AND PLANT FOR DEPOLYMERIZATION OF CH CHAINS OF SOLID MATERIALS.
JP4553674B2 (en) * 2004-10-15 2010-09-29 住友化学株式会社 How to remove chlorine gas
FR2884440B1 (en) * 2005-04-14 2007-07-27 Framatome Anp Sas METHOD FOR WASHING A GAS STREAM CONTAINING CHLORINE, DEVICE FOR CARRYING OUT SAID METHOD, AND USE OF THE METHOD
US20070122329A1 (en) * 2005-11-30 2007-05-31 Alain Briglia Purification of raw hydrogen
JP4921489B2 (en) * 2006-01-27 2012-04-25 ビーエーエスエフ ソシエタス・ヨーロピア Chlorine production method
DE102006023939A1 (en) * 2006-05-19 2007-11-22 Bayer Materialscience Ag Method of absorbing chlorine from a gas containing chlorine and carbon dioxide
DE102006023581A1 (en) * 2006-05-19 2007-11-22 Bayer Materialscience Ag Process for separating chlorine from the product gas of an HCl oxidation process
JP2008110339A (en) * 2006-10-03 2008-05-15 Sumitomo Chemical Co Ltd Method for removal of chlorine gas
WO2008041781A1 (en) * 2006-10-03 2008-04-10 Sumitomo Chemical Company, Limited Method for removal of chlorine gas
DE102007013964A1 (en) 2007-03-23 2008-09-25 Bayer Materialscience Ag Process for removing and recycling condensable components from chlorine-containing gas streams
DE102008001795A1 (en) 2008-05-15 2009-11-19 Wacker Chemie Ag Process for the absorption of chlorine from gas streams

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DE1074201B (en) * 1955-12-13 1960-01-28
DE2413358C3 (en) * 1974-03-20 1978-04-13 Bayer Ag, 5090 Leverkusen Process for the dechlorination of gas mixtures containing carbon dioxide and chlorine
DE2849498A1 (en) * 1978-11-15 1980-05-29 Metallgesellschaft Ag Chlorine removal from flue gases - by scrubbing with fresh and spent alkaline soln. at specified alkalinity
DE3603511A1 (en) * 1986-02-05 1987-08-06 Standard Elektrik Lorenz Ag METHOD AND DEVICE FOR REMOVING DUST AND GASEOUS POLLUTANTS FROM EXHAUST GAS, ESPECIALLY EXHAUST GASES IN THE LIGHTWAVE LEAD PREFORMING
US4681045A (en) * 1986-07-21 1987-07-21 William F. Cosulich Associates, P.C. Treatment of flue gas containing noxious gases

Also Published As

Publication number Publication date
US5102638A (en) 1992-04-07
EP0406675B1 (en) 1994-04-13
DE59005324D1 (en) 1994-05-19
EP0406675A1 (en) 1991-01-09
JPH03131319A (en) 1991-06-04
BR9003060A (en) 1991-08-27

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